Systemic lupus erythematosus is a chronic, multisystem, inflammatory,
autoimmune disorder characterized by formation of autoantibodies
directed against self-antigens and immune-complex formation.
It can be suspected when ≥2 organ systems are involved.
It is predominantly diagnosed in females of childbearing age, rarely diagnosed before 8 years old.
Clinical presentation varies in different patients and the disease
activity varies over time in a single patient. Majority of patients have
arthralgia of the hand.
Systolic blood pressure appears to have a strong association with aneurysmal subarachnoid haemorrhage (aSAH) but not with unruptured intracranial aneurysm (UIA), whereas current smoking and female sex are risk factors for both conditions, a study has found.